technically every mod is downloadable if you do a little decompiling (not advocating for this though. if you do, just strictly use it for like studying how things in the mod are and do NOT distribute it)
Viewing post in Sprunki: Msi But Bad RECAST comments
to decompile:
run the project
right click the black area of the loading screen
click on 'View frame source', it will open up a tab.
delete the 'view-source:' part of the page at the top
right click the black area of this page and click 'Save as'
once the html file is downloaded, go to turbowarp unpackager and insert the html file.
once it's finished converting, download it.
you now have your poopy sb3 file